Sunny with very warm air temperatures, feeling like 28 °C once we account for any wind. Sea temperatures (27 °C) very warm too. Staying comfortable in the water at Gerpuk Bay - Inside Gerpuk won't be a problem, but wear at least a rash-vest to keep the UV off.

Grupuk sea water temperatures peak in the range 28 to 30°C (82 to 86°F) on around the 8th of January and are at their coldest on about the 14th of August, in the range 25 to 28°C (77 to 82°F). Year round warm sea water temperatures at Grupuk mean that a rash vest and board shorts should be fine for surfing at any time of year